Sherwood 29000 Pump Series Technical User guide

Brand: Sherwood

Model: 29000 Pump Series Technical

Type: User guide

Sherwood 29000 Pump Series Technical: The Ultimate Engine Cooling Solution

The Sherwood 29000 Pump Series Technical is a high-performance engine cooling pump designed to provide reliable and efficient cooling for your marine engine. With its innovative design and durable construction, this pump is capable of handling even the most demanding applications.

Key Features:

Robust Construction: Built to withstand harsh marine environments, the 29000 Series pump features a durable housing and corrosion-resistant components for long-lasting performance.
Enhanced Cooling Efficiency: The pump's unique impeller design ensures maximum water flow, providing superior cooling performance for your engine.

Sherwood 29000 Pump Series Technical: The Ultimate Engine Cooling Solution

Key Features:

Robust Construction: Built to withstand harsh marine environments, the 29000 Series pump features a durable housing and corrosion-resistant components for long-lasting performance.
Enhanced Cooling Efficiency: The pump's unique impeller design ensures maximum water flow, providing superior cooling performance for your engine.

The Original Engine Cooling Pump Since 1921

ww.sherwoodpumps.com

29000 Pump Series Technical Guide

Identification

G2904-01, G2904X

G2902-01, G2902X

G2903-01, G2903-02, G2903X

MPG_3062_111reva 1/25/11 12:36 PM Page 1

The following assembly/disassembly procedures apply to all 29000 Series pumps. Deviations from pump to pump are primarily a

result of different methods of drive and mounting. Pump numbers can be found stamped into the cover plate of the pump.

Disassemb

ly:

A. Remove the bolts (1) and lockwashers (2) from the cover (3).

B. Remove the cover, quad rings (4), impeller (5), cam liner halves (6), and wearplate (7). Note the direction of the impeller blades

to ensure proper replacement of the impeller during the assembly procedure. Caution: the pin (8) might fall out from its place

between the cam liner halves.

C. Using external snap ring pliers, remove the retaining ring (9) from the shaft.

D. Slide the washer (10) and mechanical seal (11) off of the shaft.

Remove the bolts (12) holding the body (13) to the housing (14).

Slide the housing off of the shaft and body assemb

ly.

Press the seal seat (15) out of the housing.

H. When applicable remove the drive gear assembly: while supporting the drive gear (16), remove the nut (17), nut washer (18),

and key (19) from the shaft. Slide the gear off of the shaft and remove the thrust washer (20) behind the gear.

I. Using internal snap ring pliers, remove the retaining ring (21) from the body. Remove the bearing shield (24) from the body.

J. Press the bearing and shaft assembly (22) out of the body.

K. Remove the lip seal (23) and washer (25) from the body.

L. Inspect the shaft for grooving of the lip seal area and heavy fretting of the spline portion that drives the impeller. Inspect the

bear

ings for loss of g

rease, corrosion, and rough rotation. If the shaft or bearings exhibit such a wear, replace the entire shaft

and bearing assembly (22) listed on page 4.

Warning: Do not try to build the shaft and bearing assembly from the individual parts, but instead purchase the entire shaft and

bear

ing assembly listed belo

Due to e

xtremely tight toler

ances

, special assembly procedures for this assembly must be followed

to prevent galling of the shaft in the lip seal area.

Assemb

ly:

A. Replace the washer (25) then press the lip seal (23) into the pump body (13) with the metal backing ring of the lip seal toward

the housing (14) and away from the engine. Care should be taken to insure proper alignment of the lip seal to the pump body

and that the lip seal is uniformly pressed to prevent distortion.

Press the shaft and bear

ing assemb

ly (22) into the pump body.

Slide the bear

ing shield (24) into the pump body and against the inner bearing.

Using internal snap ring pliers, install the retaining ring (21) into the body.

Assembly / Disassembly Instructions

MPG_3062_111reva 1/25/11 12:36 PM Page 2

Assembly / Disassembly Instructions (continued)

E. E. Press the mechanical seal seat (15) into the housing with the gray silicon carbide face toward the impeller. Lubricate the

outside of the seat boot with a water soluble lubricant or soapy water for easier assembly. Oil or grease must not be used as it

will prevent the rubber cup assembly from properly gripping the housing. The seat should be inspected to ensue that the cup

did not become partially dislodged during the assembly procedure.

F. Slide the housing over the shaft and body assembly. Apply Loctite #262 or equivalent to the bolt threads. Fasten the three

bolts (12) and torque them to 25 ft-lbs.

G. When applicable, replace the drive gear assembly. Slide the thrust washer (20) onto the outer bearing. Place the key (19) in the

shaft, then slide the gear (16) on the shaft. Apply Loctite #262 or equivalent to the shaft threads. Replace the washer (18),

then tighten the nut (17) onto the shaft for the G2902-01 and G2902X. While supporting the drive gear, torque the nut to 270 ft-lbs

. Lubricate the inter rubber portion of the mechanical seal (11) with a water soluble lubricant or soapy water and slide the seal

nto the shaft, with the silicon carbide portion of the mechanical seal toward the seal seat. Oil or grease must not be used as it

ill prevent the mechanical seal from properly gripping the shaft.

I. Place the washer (10) onto the shaft and against the mechanical seal and then using external snap ring pliers, install the

retaining ring (9) into the groove in the shaft to compress the mechanical seal.

J. Install the wearplate (7) with the hole in the plate lined up with the slot in the housing. Install the quad ring (4) into the housing

and on top of the wearplate.

K. Create the cam assembly by connecting the cam halves (6) together and installing the pin (8) into the cam liner. A dab of

grease can be used to hold the pin in place during installation. Place the cam assembly into the housing, ensuring that the pin

aligns with the slot in the housing.

L. Insert the impeller (5) in the housing using a twisting motion. Ensure that the impeller blades are bent in the same direction as

upon removal (dependent on the pump model – see illustration below for details). For ease of installation, apply a silicon

lubricant to the impeller.

Caution: DO NOT USE A PETROLEUM-BASED LUBRICANT (petroleum product will cause damage

to the impeller).

Vanes flipped to the left

(vie

wed from cover).

Models: G2902-01, G2902X, G2903-01,

G2903-02, G2903X

Inser

t the remaining quad ring (4) into the g

roo

e, install the cover (3) on the housing, and then fasten the

lockwashers (2) and bolts (1) to 8 ft-lbs. torque.

N. After installation, inspect the pump seal, lip seal, body and housing areas for leaks.

Vanes flipped to the right

(vie

wed from cover).

Models: G2904-01, G2904X

MPG_3062_111reva 1/25/11 12:36 PM Page 3

Preventative MaintenanceAssembly / Disassembly Instructions (continued)

herwood #

2902-01

2902X

2903-01

2903-02

2903X

2904-01

2904X

Item QTY

1 Cap Screw 5 19626-SHW 19626-SHW 19626-SHW 19626-SHW 19626-SHW 19626-SHW 19626-SHW

2 L

ockwasher

5 1

5944-SHW

3 Cover Plate 1 19837-SHW 19837-SHW 19837-SHW 19837-SHW 19837-SHW 19837-SHW 19837-SHW

4 Quad Ring 2 21561-SHW 21561-SHW 21561-SHW 21561-SHW 21561-SHW 21561-SHW 21561-SHW

5 Impeller 1 29000-SHW 29000-SHW 29000-SHW 29000-SHW 29000-SHW 29000-SHW 29000-SHW

6 Cam Liner Halves 2 21533-SHW 21533-SHW 21106-SHW 21106-SHW 21106-SHW 21106-SHW 21106-SHW

7 Wear Plate 1 19836-SHW 19836-SHW 19836-SHW 19836-SHW 19836-SHW 19836-SHW 19836-SHW

8 Pin 1 21566-SHW 21566-SHW 21566-SHW 21566-SHW 21566-SHW 21566-SHW 21566-SHW

9 Retaining Ring 2 19762-SHW 19762-SHW 19762-SHW 19762-SHW 19762-SHW 19762-SHW 19762-SHW

10 Washer 1 19866-SHW 19866-SHW 19866-SHW 19866-SHW 19866-SHW 19866-SHW 19866-SHW

11/15 Mechanical Seal Assy. 1 23837-SHW 23837-SHW 24511-SHW 24511-SHW 24511-SHW 23837-SHW 23837-SHW

12 Bolt 3 21172-SHW 21172-SHW 21172-SHW 21172-SHW 21172-SHW 21172-SHW 21172-SHW

13 Body 1 23916-SHW 23916-SHW 23396-SHW 23396-SHW 23396-SHW 21827-SHW 21827-SHW

14 Housing 1 24623-SHW 24623-SHW 23523-SHW 23523-SHW 23523-SHW 21829-SHW 21829-SHW

16 Gear 1 22789-SHW 22789-SHW

17 Nut 1 22790-SHW 22790-SHW

18 Washer 1 22788-SHW 22788-SHW

19 Keyr 1 22791-SHW 22791-SHW

20 Gear Spacer 1 23926-SHW 23926-SHW

21 Retianing Ring 1 19867-SHW 19867-SHW 19867-SHW 19867-SHW 19867-SHW 19867-SHW 19867-SHW

22 Bearing and Shaft

Assy

1 25145-SHW 25145-SHW 25103-SHW 25103-SHW 25103-SHW 25112-SHW 25112-SHW

23 Lip Seal 1 23045-SHW 23045-SHW 23045-SHW 23045-SHW 23045-SHW 19869-SHW 19869-SHW

24 Bearing Shield 1 23425-SHW 23425-SHW 23425-SHW 23425-SHW 23425-SHW

Minor Repair Kit 25146-SHW 25146-SHW 25044-SHW 25044-SHW 25044-SHW 25146-SHW 25146-SHW

Major Repair Kit 25147-SHW 25147-SHW 25045-SHW 25045-SHW 25045-SHW 25148-SHW 25148-SHW

MPG_3062_111reva 1/25/11 12:36 PM Page 4

29000 Impeller & Impeller Puller

The patented 18000 impeller with threaded insert makes replacement easy when using the inexpensive

Sherwood Impeller Puller (Model #23631).

Removal

• Remove the cover.

• Insert the Sherwood puller into the threaded insert.

• Screw the puller against the shaft lifting the impeller until

loose.

• Twist and pull the impeller out of the pump.

Installation

• Apply a non-petroleum based lubricant to impeller (i.e. silicon

or soapy water).

• Install the impeller with a twisting motion onto the shaft.

• Option: Use puller tool to push impeller into pump by

loosening and lowering nut until tightening against impeller

insert occurs, then turning for installation.

• Then use a small amount of non-petroleum based lubricant

to help hold the o-ring in place while replacing the cover.

Use the same puller (#23631 or 25105) f

or the 17000, 18000,

22000, 26000, 30000 impeller as w

ell.

Impeller Removal

MPG_3062_111reva 1/25/11 12:36 PM Page 5

Preventative Maintenance

The #1 reason for premature engine wear is overheating.

To maintain engine performance, insist upon genuine Sherwood impellers and service kits.

Impeller Kit

29000K

Minor Kit

25146

Minor Kit

25044

Major Kit

25147

Major Kit

25045

Major Kit

25148

29000-SHW Impeller 29000-SHW Impeller 29000-SHW Impeller 29000-SHW Impeller 29000-SHW Impeller 29000-SHW Impeller

21561-SHW Quad Ring 21561-SHW Quad Ring 21561-SHW Quad Ring 21561-SHW (2) Quad Ring 21561-SHW (2) Quad Ring 21561-SHW Quad Ring

21566-SHW Pin 21566-SHW Pin 21566-SHW Pin 21566-SHW Pin 21566-SHW Pin 1-21566-SHW Pin

19762-SHW Snap Ring 19762-SHW Snap Ring 19762-SHW Snap Ring 19762-SHW Snap Ring 19762-SHW Snap Ring

19866-SHW Washer 19866-SHW Washer 19866-SHW Washer 19866-SHW Washer 19866-SHW Washer

223837-SHW Seal Assy. 24511-SHW Seal Assy. 23837-SHW Seal Assy. 24511-SHW Seal Assy. 23837-SHW Seal Assy.

1720-0212-SHW O-ring 19836-SHW Wear Plate 1720-0212-SHW O-ring 19835-SHW Washer

1720-0213-SHW O-ring 19837-SHW Cover 1720-0213-SHW O-ring 19836-SHW Wear Plate

19836-SHW Wear Plate 21533-SHW (2) Cam Halves 19836-SHW Wear Plate 19837-SHW Cover

19837-SHW Cover 19867-SHW Snap Ring 19837-SHW Cover 21106-SHW (2) Cam Halves

21106-SHW (2) Cam Halves 19868-SHW Slinger 21106-SHW (2) Cam Halves 19867-SHW Sna

p Ring

22788-SHW Washer 19867-SHW Snap Ring 19868-SHW Slinger

22790-SHW Nut 19868-SHW Slinger 19869-SHW Lip Seal

22791-SHW Key 23045-SHW Lip Seal

23045-SHW Lip Seal 23425-SHW Sheild

23425-SHW Sheild 25103-SHW Shaft/Bearing Assy

23926-SHW Gear

Spacer

G2902-01 X X X

G2902X X X X

G2903-01 X X X

G2903-02 X X X

G2903X X X X

G2904-01 X X

G2904X X X X

Pleasure Boating Commercial/Fishing Use

Maintenance

(Low Hours) (High Hours)

Schedule L

ight Duty Severe Duty Heavy Duty Severe Duty

(High RPM, Silt or Sand) (High RPM, Silt or Sand)

Impeller Kit

Every year 6 months 6 months 3 months

Minor Kit 2 years Every year Every year 6 months

Major Kit 4 years 2 years 2 years Every year

MPG_3062_111reva 1/25/11 12:36 PM Page 6

The #1 reason for premature engine wear is overheating.

To maintain engine performance, insist upon genuine Sherwood impellers and service kits.

Recommended inspection to be performed at any service interval:

Impeller . . . . . . . . . Inspect for cracks or tears. Also, inspect for excessive abrasion of vane ends.

eplace annually, or if any of the conditions exist, as in the picture below.*

Wear Plate . . . . . . . Inspect for wear, flatness, and pin for fatigue.

Replace at major pump rebuild or if wear is evident to

maintain pump flow and suction performance.

Cam . . . . . . . . . . . . Replace at minor or major pump rebuild or if

pitting/wear is evident.

Cover . . . . . . . . . . . Replace at major pump rebuild or if wear exists to

maintain pump flow and suction performance.

Mechanical Seal Replace at minor and major pump rebuild or if

leaking.

Lip Seal . . . . . . . . . . Replace at major pump rebuild or if leaking.

Shaft . . . . . . . . . . . . Inspect for wear in area of lip seal and rubber impeller.

Grooving of lip seal area or heavy fretting of the

impeller end shaft will require shaft replacement.

Bear

ing

. . . . . . . . . . Inspect for loss of grease, corrosion or rough rotation.

Replace at major pump rebuild as the entire shaft and

bearing assembly (see page 4 for proper assembly number).

To maintain best engine performance and to prolong engine life - replace your impeller annually.*

Three tips to help you install your new impeller:

• Use a non-petroleum based lubricant (silicon or soapy water) to help slide the impeller into the housing.

• Install the impeller with a twisting motion onto the shaft. Never force an impeller onto the shaft. The impeller

must be able to move freely on the shaft to properly prime and function.

• Use a small amount of non-petroleum based lubricant to help hold the o-ring when replacing the cover.

Proper storage of the impellers during a prolonged lay-up can help maintain the life of the impeller.

Remove the impeller from the housing and store in a cool, dark place. This will avoid the following:

• Copper bonding of the impeller to the housing

•

anes "setting" into position as stored in the housing

• Ultraviolet deterioration

See Maintenance Schedule on page 6

Genuine Sherwood Tech Tips

Inspection

Bead worn

to flat

Pitting

Tear

Cavitation

Bowed (set)

Ripped

Vane

MPG_3062_111reva 1/25/11 12:37 PM Page 7

1/11 Re

orm L-3062

SPECIALTY/OEM GROUP

375 Fifth Avenue NW

•

New Brighton, MN 55112

Phone: +1 651-766-6300

•

800-471-0460

•

Fax: +1 651-766-6603

www.sherwoodpumps.com

MPG_3062_111reva 1/25/11 12:37 PM Page 8

Sherwood 29000 Pump Series Technical User guide

Brand: Sherwood

Model: 29000 Pump Series Technical

Type: User guide

Sherwood 29000 Pump Series Technical: The Ultimate Engine Cooling Solution

Key Features:

Robust Construction: Built to withstand harsh marine environments, the 29000 Series pump features a durable housing and corrosion-resistant components for long-lasting performance.
Enhanced Cooling Efficiency: The pump's unique impeller design ensures maximum water flow, providing superior cooling performance for your engine.

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Sherwood 29000 Pump Series Technical User guide

Sherwood 29000 Pump Series Technical User guide

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